Effects of the Sun on Your Paint - Imagine Painting
Effects of the Sun on Your Paint - Imagine Painting - Luxury Painters Calgary

Effects of the Sun on Your Paint

August 1, 2018

While interior paints are important for achieving the desired atmosphere and beautifying your home, exterior paints have the unfortunate job of taking the brunt of the elements. Whether it be rain, snow, or direct sunlight, there seems to be no shortage of dangers that threaten the quality of an exterior paint job. Out of these, sunlight in particular can have a lasting impact on a painter’s hard work.


Photodegradation is a fancy term for the breakdown of the chemical bonds between individual paint molecules. Ultraviolet radiation from the sun can energize these bonds and cause them to break. Because a paint’s colour is dependent upon its composition, breaking these bonds will result in a change in colour. Usually, this means that your paint won’t look as deep or as vibrant as it was before. Dark colours are able to better absorb ultraviolet light, causing them to degrade a tad faster. It’s important to note that this isn’t a fast process, and it may take years before you notice significant fading.


Besides photodegradation, the heat from constant sun exposure can cause paint to blister, causing the formation of small bubbles. This process is expedited in the presence of excessive or constant heat. The bubbles run the risk of bursting, leaving a hole in your home’s coating of paint. Obviously, this is going to detract from your home’s aesthetic. If the hole is left unpatched, it can act like a chink in your home’s armour, allowing moisture and dust to sneak in. This can cause nearby paint the get lifted as well, worsening the problem and causing your paint to peel. Because a small hole can quickly widen, it’s in your best interest to patch these up as soon as you spot them. Again, darker colours are more susceptible due to the fact that they absorb heat better.


What can you do to prevent damage to your exterior? Unless you plan on getting rid of the sun, there isn’t a whole lot you can do in terms of prevention. However, you can prolong the life of your paint by choosing high quality painters who know what they’re up against. Talk with them to see what kind of paint they’ve chosen for your exterior. Normally, acrylic latex based paints do the best job of resisting sun damage. Finally, you can think about what colour you want to use, as darker colours won’t last as long as lighter ones.

Although a lot of damage from sunlight is simply unavoidable, there are ways to mitigate it. Imagine Painting has the expertise and the right materials to create beautiful and luxurious exterior paint jobs that stand their own against the neverending rays. Call Imagine Painting at 403-305-8786 or visit our website at info@imaginepainting.ca to find out more about what makes us different.


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